Threaded nut



V. J. VAN HORN. THREADED NUT. APPLICATION FILED 13.112, 1919.

Patented oct. 17,1922..

We @2x5/Q Patented @et 17, i922.

Mitten@ vANnrvEn J. Valencian, 'or enrol-reo, ILLINOIS.

Aterrien/anni) NUT.

Application filed February l12, 1919.A Serial No. 276,516.

To all whom z'z may concern:

Be it known that l, VANDIVER J; Van HORN, a citizen of the United States, resid` ing'at Chicago, in the countyl of Cook and State of Illinois, have invented certain new and useful Improvements in Threaded Nuts, of which the following is a specification.

My invention relates to improvements in threaded nuts and has especial reference to check nuts, in which a definite frictional Contact engagement of the nut is continuously maintained with the bolt.

One of the objects of my invention is to provide a threaded nut having an attachment that will exert a continuous yielding tension on the 4threads of a bolt to hold the nut in selected position thereon,

The device is not a nut lock, in the sense that the word is used in connection with means to securely tix a nut on a bolt, but is intended only for the purpose of exerting relatively less friction land only suiiicient to maintain the nut in selected positions on the bolt to prevent its axial movement except when intentionally turned or rotated for that purpose. 5

` There are many environments where a device of this character is to be desired, on Compasses, calipers, tension and feed mechanisms, wherein the nut is to be turned from time to time by grasping it between the thumb and nger of the operator.

Other land further objects of my invention will become readily apparent, to persons skilled in the art, from a consideration of the following description when taken in con- `junction with the drawings, wherein Fig. l shows one form of nut, carrying the friction ring.

Fig. 2 is an axial section, taken on line an of Fig. 1.

Fig. 3 is a transverse section, taken on line 3 3 of Fig. 1. y

Fig. 4 is a sectional view of another form of thumb nut carrying the friction ring.v

Fig. 5 is a transverse section taken on line 5 5 of Fig. 4.

In all the views the same reference characters are employed to indicate similar parts.

l() is a threaded bolt or stem upon which the thumb nut l1 is adapted to be moved raxially thereof by rotating it, by grasping the part 12 between the thumb and finger` This is a special nut for compasses, dividers, and the like.

After the thread has been cut in the nut,

a slot 13 is cut preferably, in the smaller part of the nut, or the hub, within which toinserta spring wire ring le. Registering with the slot 13 is an annular groove l5, in which the wire ring la rests to prevent its axial. movement vand displacement. The round part 16 of the ring is located within this groove and the fiat part 17 is in contact with the threads 0f the stem or bolt l0 and exerts a frictional resistance to the r0- tation of the nut, in accordance with the tension exerted by the ring 14.

In Fig. t l have shown a slightly different form of nut 1l having a hub 18 within which is cut a slot 13 for a ring 14. To insert the ring in its position on either form of nut the fiat portion 17 is first put in the slot 13 and the round portion is snapped over the other side of the hub. The contact of the flat portion of the ring with the threads of the bolt or stem 10, produces sufficient friction to maintain the nut in selected position thereon and prevent it from coming loose or being moved axially, as a result of jar or other vibration. After either form of nut has been made the slot 13 is cut through the body part thereof by sawing tangentially of the inner surface of the nut until the slot extends into the bore of the nut. Then, when the wire is in place, the fiat portion 1T will 'contact with the bolt within the nut and produce the desired resistance to rotation. It will be manifest that the larger portion of the nut could be provided with the slot 13 if desired, but it is more economical to place the slot in the portion of the nut of smaller diameter.

Vhile l have herein shown a single embodiment of my invention for the purpose of clear disclosure, it is manifest that there may be changes made in the general arrangement and configuration of the parts within the scope of the appended claims.

Having described my invention, what I claim is 1. A nut having a threaded bore and a straight across slot extending into the bore and tangential thereto and a groove extending around the nut and connected at each end to the slot in combination with a spring ring having a straight, unconfined portion lying within the slot and a curved spring portion within the groove, the curved poi'- tion serving as a spring to press the straight portion into contact with a bolt upon which the nut may be placed.

lll)

2. A nut having a slot extending straight across into the bore of the nut and an annular groove registering` with the ends of the slot; a spring ring having a round portion Within the groove and a straight portion tangentialv to the bore7 within the slot, the latter portion to lie between the threads of the bolt and extending` from its curved portion toward the free end of its Curved portion.

3. A nut having a threaded bore, a transversely extending slot eut from one side and intersecting` the bore, and an annular groove registeriing With the ends of the slot, the

slot forming Hat surfaces on opposite sides of the bore; and a spring ring having a rounded portion received in the groove and a straight portion extending through the slot and intersecting-the bore to .engage the Hat surfaces on opposite sidesoff the bore Whereby its inward movement Within the bore is 20 limited, andthe Said straight portion, when the nut is placed upon a bolt, yieidingiy engaging the threads of the-bolt.

In testimony whereof I hereunto subscribed my name.

VANDIVER J. VAN HORN. 

